Distribution and Ecology - On sandy or stony flats and hillsides in cerrado or margin of cerradão, 450-700 m, local on the upper rios Araguaia and das Mortes between 15°30' and 16°30'S in s.-e. Mato Grosso and s.- w. Goiás (Sa. do Caiapó).—Fl. V-YI; fr. VI onward, long persistent on defoliate stems. — Calumbí. Map 32.

Discussion:

The var. gravida is notable for its massive pod with exceptionally wide replum and valves about 0.5-0.8 mm thick, of which all but 0.1 mm consists of livid exocarp. In foliage it closely resembles distantly allopatric var. pachycarpa, which has pods less than half as long and in addition smaller capitula and individual flowers. From var. multipinna, not far distant on Sa. Dourada, it differs in substantially fewer pinnae.